Magnetic fields are thought to play a significant role in
all stages of star formation. However, there are few
observations that measure magnetic fields at the relevant
scale for the star formation process. In this talk, I will
present the results from a survey of linear polarization in
molecular cores at 1.3 mm wavelength with the BIMA
millimeter interferometer. The observations achieve angular
resolution up to 2", which is more than 5 times better than
previous single-dish observations. The improvement in
angular resolution allows me to investigate detailed
magnetic field morphology and obtain reliable values for the
dispersion of the polarization angles. The analysis in the
dispersion of the polarization angles further provides
estimates for the magnetic field strengths in the plane of
sky, the upper limit of the mass-to-flux ratios, and the
turbulent to magnetic energy ratios. I will discuss the
implications of our new results for star formation.

The author(s) of this abstract have provided an email address
for comments about the abstract:
slai@astro.uiuc.edu